Abstract

The optical performance of a cw PIE CO2 laser has been substantially improved through the adoption of a burst-mode gain switching technique. The approach has provided a doubling of the average beam power extractable from the device. With appropriate optimization, the process could possibly permit the attainment of pulsed energy extraction in the kilohertz range, and with average optical powers within the several tens of kilowatt category.

© 1989 Optical Society of America

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References

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  1. C. S. Lee, A. Goel, H. Osada, “Parametric Studies of Pulsed Laser Cutting of Thin Metal Plates,” ICALEO, 44, 86 LIA, (1984).
  2. D. Schuocker, “Dynamic Phenomena in Laser Cutting and Cut Quality,” Appl. Phys. B. 40, 9 (1986).
    [CrossRef]
  3. R. A. Hella, “Material Processing with High Power Lasers,” Opt. Eng. 17, 198 (1978).
    [CrossRef]
  4. V. E. Merchant, H. J. J. Seguin, J. Dow, “High Power, High Repetition Rate Pulser for Photo-Impulse Ionized Lasers,” Rev. Sci. Instrum. 49, 1631 (1978).
    [CrossRef] [PubMed]
  5. H. J. J. Seguin, K. H. Nam, J. Dow, V. Seguin, “Crossed-Tube Fluid-Ballasted Electrode Pair for EDL Applications,” Appl. Opt. 20, 2233 (1981).
    [CrossRef] [PubMed]
  6. H. J. J. Seguin, J. Dow, V. A. Seguin, “Simple and Economic Compressors for Large Volume Gas Transport Laser Systems,” Rev. Sci. Instrum. 54, 1338 (1983).
    [CrossRef]
  7. H. J. J. Seguin, K. H. Nam, J. Tulip, “The Photo-Initiated, Impulse-Enhanced, Electrically-Excited, (PIE) Discharge for High Power CW Laser Applications,” Appl. Phys. Lett. 32, 418 (1978).
    [CrossRef]
  8. S. K. Nikumb, H. J. J. Seguin, V. A. Seguin, H. Reshef, “Gain and Saturation Parameters of a Multikilowatt PIE CO2 Laser,” J. Phys. E 20, 911 (1987).
    [CrossRef]
  9. A. K. Nath, H. J. J. Seguin, V. A. Seguin, “Optimization Studies of a Multikilowatt PIE CO2 Laser,” IEEE J. Quantum Electron. QE-22, 268 (1986).
    [CrossRef]
  10. D. T. Rampton, O. P. Gandhi, “Performance Characteristics of a Helical TEA CO2 Laser,” Appl. Phys. Lett. 21, 457 (1972).
    [CrossRef]
  11. P. W. Smith, O. R. Wood, P. J. Maloney, C. R. Adams, “Transversely Excited Waveguide Gas Lasers,” IEEE J. Quantum Electron. QE-17, 1166 (1981).
    [CrossRef]

1987

S. K. Nikumb, H. J. J. Seguin, V. A. Seguin, H. Reshef, “Gain and Saturation Parameters of a Multikilowatt PIE CO2 Laser,” J. Phys. E 20, 911 (1987).
[CrossRef]

1986

A. K. Nath, H. J. J. Seguin, V. A. Seguin, “Optimization Studies of a Multikilowatt PIE CO2 Laser,” IEEE J. Quantum Electron. QE-22, 268 (1986).
[CrossRef]

D. Schuocker, “Dynamic Phenomena in Laser Cutting and Cut Quality,” Appl. Phys. B. 40, 9 (1986).
[CrossRef]

1984

C. S. Lee, A. Goel, H. Osada, “Parametric Studies of Pulsed Laser Cutting of Thin Metal Plates,” ICALEO, 44, 86 LIA, (1984).

1983

H. J. J. Seguin, J. Dow, V. A. Seguin, “Simple and Economic Compressors for Large Volume Gas Transport Laser Systems,” Rev. Sci. Instrum. 54, 1338 (1983).
[CrossRef]

1981

H. J. J. Seguin, K. H. Nam, J. Dow, V. Seguin, “Crossed-Tube Fluid-Ballasted Electrode Pair for EDL Applications,” Appl. Opt. 20, 2233 (1981).
[CrossRef] [PubMed]

P. W. Smith, O. R. Wood, P. J. Maloney, C. R. Adams, “Transversely Excited Waveguide Gas Lasers,” IEEE J. Quantum Electron. QE-17, 1166 (1981).
[CrossRef]

1978

R. A. Hella, “Material Processing with High Power Lasers,” Opt. Eng. 17, 198 (1978).
[CrossRef]

V. E. Merchant, H. J. J. Seguin, J. Dow, “High Power, High Repetition Rate Pulser for Photo-Impulse Ionized Lasers,” Rev. Sci. Instrum. 49, 1631 (1978).
[CrossRef] [PubMed]

H. J. J. Seguin, K. H. Nam, J. Tulip, “The Photo-Initiated, Impulse-Enhanced, Electrically-Excited, (PIE) Discharge for High Power CW Laser Applications,” Appl. Phys. Lett. 32, 418 (1978).
[CrossRef]

1972

D. T. Rampton, O. P. Gandhi, “Performance Characteristics of a Helical TEA CO2 Laser,” Appl. Phys. Lett. 21, 457 (1972).
[CrossRef]

Adams, C. R.

P. W. Smith, O. R. Wood, P. J. Maloney, C. R. Adams, “Transversely Excited Waveguide Gas Lasers,” IEEE J. Quantum Electron. QE-17, 1166 (1981).
[CrossRef]

Dow, J.

H. J. J. Seguin, J. Dow, V. A. Seguin, “Simple and Economic Compressors for Large Volume Gas Transport Laser Systems,” Rev. Sci. Instrum. 54, 1338 (1983).
[CrossRef]

H. J. J. Seguin, K. H. Nam, J. Dow, V. Seguin, “Crossed-Tube Fluid-Ballasted Electrode Pair for EDL Applications,” Appl. Opt. 20, 2233 (1981).
[CrossRef] [PubMed]

V. E. Merchant, H. J. J. Seguin, J. Dow, “High Power, High Repetition Rate Pulser for Photo-Impulse Ionized Lasers,” Rev. Sci. Instrum. 49, 1631 (1978).
[CrossRef] [PubMed]

Gandhi, O. P.

D. T. Rampton, O. P. Gandhi, “Performance Characteristics of a Helical TEA CO2 Laser,” Appl. Phys. Lett. 21, 457 (1972).
[CrossRef]

Goel, A.

C. S. Lee, A. Goel, H. Osada, “Parametric Studies of Pulsed Laser Cutting of Thin Metal Plates,” ICALEO, 44, 86 LIA, (1984).

Hella, R. A.

R. A. Hella, “Material Processing with High Power Lasers,” Opt. Eng. 17, 198 (1978).
[CrossRef]

Lee, C. S.

C. S. Lee, A. Goel, H. Osada, “Parametric Studies of Pulsed Laser Cutting of Thin Metal Plates,” ICALEO, 44, 86 LIA, (1984).

Maloney, P. J.

P. W. Smith, O. R. Wood, P. J. Maloney, C. R. Adams, “Transversely Excited Waveguide Gas Lasers,” IEEE J. Quantum Electron. QE-17, 1166 (1981).
[CrossRef]

Merchant, V. E.

V. E. Merchant, H. J. J. Seguin, J. Dow, “High Power, High Repetition Rate Pulser for Photo-Impulse Ionized Lasers,” Rev. Sci. Instrum. 49, 1631 (1978).
[CrossRef] [PubMed]

Nam, K. H.

H. J. J. Seguin, K. H. Nam, J. Dow, V. Seguin, “Crossed-Tube Fluid-Ballasted Electrode Pair for EDL Applications,” Appl. Opt. 20, 2233 (1981).
[CrossRef] [PubMed]

H. J. J. Seguin, K. H. Nam, J. Tulip, “The Photo-Initiated, Impulse-Enhanced, Electrically-Excited, (PIE) Discharge for High Power CW Laser Applications,” Appl. Phys. Lett. 32, 418 (1978).
[CrossRef]

Nath, A. K.

A. K. Nath, H. J. J. Seguin, V. A. Seguin, “Optimization Studies of a Multikilowatt PIE CO2 Laser,” IEEE J. Quantum Electron. QE-22, 268 (1986).
[CrossRef]

Nikumb, S. K.

S. K. Nikumb, H. J. J. Seguin, V. A. Seguin, H. Reshef, “Gain and Saturation Parameters of a Multikilowatt PIE CO2 Laser,” J. Phys. E 20, 911 (1987).
[CrossRef]

Osada, H.

C. S. Lee, A. Goel, H. Osada, “Parametric Studies of Pulsed Laser Cutting of Thin Metal Plates,” ICALEO, 44, 86 LIA, (1984).

Rampton, D. T.

D. T. Rampton, O. P. Gandhi, “Performance Characteristics of a Helical TEA CO2 Laser,” Appl. Phys. Lett. 21, 457 (1972).
[CrossRef]

Reshef, H.

S. K. Nikumb, H. J. J. Seguin, V. A. Seguin, H. Reshef, “Gain and Saturation Parameters of a Multikilowatt PIE CO2 Laser,” J. Phys. E 20, 911 (1987).
[CrossRef]

Schuocker, D.

D. Schuocker, “Dynamic Phenomena in Laser Cutting and Cut Quality,” Appl. Phys. B. 40, 9 (1986).
[CrossRef]

Seguin, H. J. J.

S. K. Nikumb, H. J. J. Seguin, V. A. Seguin, H. Reshef, “Gain and Saturation Parameters of a Multikilowatt PIE CO2 Laser,” J. Phys. E 20, 911 (1987).
[CrossRef]

A. K. Nath, H. J. J. Seguin, V. A. Seguin, “Optimization Studies of a Multikilowatt PIE CO2 Laser,” IEEE J. Quantum Electron. QE-22, 268 (1986).
[CrossRef]

H. J. J. Seguin, J. Dow, V. A. Seguin, “Simple and Economic Compressors for Large Volume Gas Transport Laser Systems,” Rev. Sci. Instrum. 54, 1338 (1983).
[CrossRef]

H. J. J. Seguin, K. H. Nam, J. Dow, V. Seguin, “Crossed-Tube Fluid-Ballasted Electrode Pair for EDL Applications,” Appl. Opt. 20, 2233 (1981).
[CrossRef] [PubMed]

V. E. Merchant, H. J. J. Seguin, J. Dow, “High Power, High Repetition Rate Pulser for Photo-Impulse Ionized Lasers,” Rev. Sci. Instrum. 49, 1631 (1978).
[CrossRef] [PubMed]

H. J. J. Seguin, K. H. Nam, J. Tulip, “The Photo-Initiated, Impulse-Enhanced, Electrically-Excited, (PIE) Discharge for High Power CW Laser Applications,” Appl. Phys. Lett. 32, 418 (1978).
[CrossRef]

Seguin, V.

Seguin, V. A.

S. K. Nikumb, H. J. J. Seguin, V. A. Seguin, H. Reshef, “Gain and Saturation Parameters of a Multikilowatt PIE CO2 Laser,” J. Phys. E 20, 911 (1987).
[CrossRef]

A. K. Nath, H. J. J. Seguin, V. A. Seguin, “Optimization Studies of a Multikilowatt PIE CO2 Laser,” IEEE J. Quantum Electron. QE-22, 268 (1986).
[CrossRef]

H. J. J. Seguin, J. Dow, V. A. Seguin, “Simple and Economic Compressors for Large Volume Gas Transport Laser Systems,” Rev. Sci. Instrum. 54, 1338 (1983).
[CrossRef]

Smith, P. W.

P. W. Smith, O. R. Wood, P. J. Maloney, C. R. Adams, “Transversely Excited Waveguide Gas Lasers,” IEEE J. Quantum Electron. QE-17, 1166 (1981).
[CrossRef]

Tulip, J.

H. J. J. Seguin, K. H. Nam, J. Tulip, “The Photo-Initiated, Impulse-Enhanced, Electrically-Excited, (PIE) Discharge for High Power CW Laser Applications,” Appl. Phys. Lett. 32, 418 (1978).
[CrossRef]

Wood, O. R.

P. W. Smith, O. R. Wood, P. J. Maloney, C. R. Adams, “Transversely Excited Waveguide Gas Lasers,” IEEE J. Quantum Electron. QE-17, 1166 (1981).
[CrossRef]

Appl. Opt.

Appl. Phys. B.

D. Schuocker, “Dynamic Phenomena in Laser Cutting and Cut Quality,” Appl. Phys. B. 40, 9 (1986).
[CrossRef]

Appl. Phys. Lett.

H. J. J. Seguin, K. H. Nam, J. Tulip, “The Photo-Initiated, Impulse-Enhanced, Electrically-Excited, (PIE) Discharge for High Power CW Laser Applications,” Appl. Phys. Lett. 32, 418 (1978).
[CrossRef]

D. T. Rampton, O. P. Gandhi, “Performance Characteristics of a Helical TEA CO2 Laser,” Appl. Phys. Lett. 21, 457 (1972).
[CrossRef]

ICALEO

C. S. Lee, A. Goel, H. Osada, “Parametric Studies of Pulsed Laser Cutting of Thin Metal Plates,” ICALEO, 44, 86 LIA, (1984).

IEEE J. Quantum Electron.

A. K. Nath, H. J. J. Seguin, V. A. Seguin, “Optimization Studies of a Multikilowatt PIE CO2 Laser,” IEEE J. Quantum Electron. QE-22, 268 (1986).
[CrossRef]

P. W. Smith, O. R. Wood, P. J. Maloney, C. R. Adams, “Transversely Excited Waveguide Gas Lasers,” IEEE J. Quantum Electron. QE-17, 1166 (1981).
[CrossRef]

J. Phys. E

S. K. Nikumb, H. J. J. Seguin, V. A. Seguin, H. Reshef, “Gain and Saturation Parameters of a Multikilowatt PIE CO2 Laser,” J. Phys. E 20, 911 (1987).
[CrossRef]

Opt. Eng.

R. A. Hella, “Material Processing with High Power Lasers,” Opt. Eng. 17, 198 (1978).
[CrossRef]

Rev. Sci. Instrum.

V. E. Merchant, H. J. J. Seguin, J. Dow, “High Power, High Repetition Rate Pulser for Photo-Impulse Ionized Lasers,” Rev. Sci. Instrum. 49, 1631 (1978).
[CrossRef] [PubMed]

H. J. J. Seguin, J. Dow, V. A. Seguin, “Simple and Economic Compressors for Large Volume Gas Transport Laser Systems,” Rev. Sci. Instrum. 54, 1338 (1983).
[CrossRef]

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Figures (8)

Fig. 1
Fig. 1

Schematic diagram of the experimental system.

Fig. 2
Fig. 2

Electrical schematic diagram of the PIE excitation system.

Fig. 3
Fig. 3

Oscilloscope trace of impulse ionization and dc sustainer current waveforms; sweep speed = 0.5 ms/div; upper trace, dc sustainer pumping current, 10 A/div; lower trace, ionization impulse burst.

Fig. 4
Fig. 4

Individual ionization impulse current waveform; sweep speed = 100 ns/div; vertical amplitude = 80 A/div.

Fig. 5
Fig. 5

Time dependence of pumping current and small signal gain; sweep speed = 1 ms/div; upper trace, dc sustainer pumping current; lower trace, small signal gain.

Fig. 6
Fig. 6

Gain delay vs probe laser position along the Z axis.

Fig. 7
Fig. 7

Gain delay as a function of gas transport velocity.

Fig. 8
Fig. 8

Optical output pulse shape; sweep speed = 2 ms/div.

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